AU598361B2 - A device for use in explosive welding of two overlapping tubular or annular elements - Google Patents
A device for use in explosive welding of two overlapping tubular or annular elements Download PDFInfo
- Publication number
- AU598361B2 AU598361B2 AU15005/88A AU1500588A AU598361B2 AU 598361 B2 AU598361 B2 AU 598361B2 AU 15005/88 A AU15005/88 A AU 15005/88A AU 1500588 A AU1500588 A AU 1500588A AU 598361 B2 AU598361 B2 AU 598361B2
- Authority
- AU
- Australia
- Prior art keywords
- support members
- housing
- members
- elements
- backup device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 239000002360 explosive Substances 0.000 title claims description 13
- 238000003466 welding Methods 0.000 title claims description 11
- 238000004880 explosion Methods 0.000 claims description 6
- 239000013536 elastomeric material Substances 0.000 claims description 2
- 230000000284 resting effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/06—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
- B23K20/08—Explosive welding
- B23K20/085—Explosive welding for tubes, e.g. plugging
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Arc Welding In General (AREA)
Description
AUSTRALIA
PatentsiAcl 598361I COMPLETE SPECIFICATION
(ORIGINAL)
Class Int. Class Application Number: Lodged: Complete Specification Lodged: Accepted: Published: Priority 470rtJns the ~irnin~ir mde ufldur Pe~ prig T io correct for 00 0 0 001 0 00~' 0 0000 00@0 0 0 0 o ,0 00 0 000 0 0 000e00 0 Related Art: APPLICANT'S REF.: SE8 7003 Name(s) of Applicant(s): SKF NOVA AB 000 Address(es) of Applicant(s): 05 so 0 *0@5 *5 05 S-415 Goteborg,
SWEDEN
Actual Inventor(s): R. Adolfson Address for Service is: PHILLIPS, ORMONDE AND FITZPATRICK Patent and Trade Mark Attorneys 367 Collins Street Melbourne, Australia, 3000
A
Complete Specification for the invention entitled: A DEVICE FOR USE IN EXPLOSIVE WELDING OF TWO OVERLAPPING TUBULAR OR ANNULAR ELEMENTS The following statement is a full description of this invention, including the best method of performing it known to applicant(s): SKF NOVA AB P1913184 4'' The present invention relates to a device for use in oxplosive welding of two overlapping tubular or annular elements.
Such a prior art device is previously known by for instance US-PS 3893222. In this known arrangement a plurality of supporting segments are braked during their radial movement by means of shock absorbing hydraulic devices or by means of devices taking up energy by material deformation.
Hydraulic devices are of complex structure and difficult to use in rapid courses such as in explosive welding. The compressibility in hydraulic fluids and the comparatively long way a shock wave propagates in the fluid means that the shock-absorbing effect in the restriction in the flow conduit of the fluid is limited.
I
o The method of taking up energy by means of plastic material deformation has the disadvantage that the deformed element has to be replaced after every welding operation.
20 The object of the present invention is to provide a device for use in explosive welding of two overlapping tubular or annular elements wherein the above-mentioned disadvantages are avoided by means of a supporting member which has a high shock-absorbing effect when taking up *000 explosive waves and which can be used several times without requiring adjustment and/or replacement of any element incorporated therein.
The present invention provides a backup device for use in explosive welding of two telescoped cylindrical members by means of an explosive charge located inside one S of said members adjacent overlapping portions of said w cylindrical members said device including: a gio".ati aly a friinarar housing surrounding said cylindrical members; block-like support members radially displaceable within said housing; elements radially displaceable within said housing, LI resting upon and displaceable with said support members, 1 -1Aand engaging said housing which defines radial friction surfaces; and means for selectively varying frictional forces between said friction surfaces; whereby, upon explosion said support members and elements are displaced radially outwardly against friction forces provided by interengaging of said frictional surfaces of said housing and elements, whereby the 'oe-means of absorbing said explosion is the frictional forces.
A device according to the invention consists of simple elements which are easily assembled and its function and characteristics are easily adjusted to make o 0 00 0 0 9000 o O 0 0 8o P 6 0 0 0 *0 *i S
C
0 eeoc..
-1Bi1 2 the device useiul in many different applications.
The invention is described in detail in the following description with reference to the accompanying drawing, which shows the basic structure of the invention. In the drawing, Fig. 1 is a view of one embodiment of a device according to the invention in a plane perpendicular to the axis of the elements to be welded. Fig. 2 is a section taken on the line A-A in Fig.l, Fig. 3 is a corresponding section in an alternative embodiment of the invention.
The illustrated device for use in explosive welding of two overlapping tubular or annular elements 1, 2, for instance a tube and a coupling for interconnecting two tubes, comprises an explosive charge 3 and a surrounding lot f annular dolly. The explosive charge 3 is located in the t V"6 t hole of element 2 in front of the overlapping portion of element 1. The dolly comprises a plurality of segments 4, tc <in the illustrated embodiment ten, said segments being tt individually radially movable and associated with braking means. Each segment 4 is provided with a plurality of frictional surfaces 5, 6, 7, 8, which extend radially relative to the dolly and cooperate with opposed frictional surfaces on i supporting means 9, which bridges said dolly.
The frictioi.al force can be adjusted due to the fact that 4 C t the opposed frictional surfaces are adjustably pressable against each other. In the illustrated embodiment this is I achieved by displacement of an axially movable insert member 11 in the supporting means 9 against an axially movable leg Sc 12 on one segment 4. The insert member 11 is displaced by means of pressure medium operated pull rod 10. The leg 12 'i in its turn is forced against a non-rotable friction disc 14. The disc 14 is arranged between two legs 12, 13 and axially movable in the supporting means 9. Thus, the frictional surfaces are located on the insert member 11, on the disc 14, on the legs of the segment 4 and, on a fixed side wall in the supporting means 9.
The segment 4 is radially movable due to the fact that the apertures in the segment for receiving the pull rod are made with a radial play. There is also a radial play LS 00521
J
I P 1. -1.40-11" V, ;115'o p; I p, i; 11 i -3between the segment 4 and the peripheral wall of the surrounding supporting means 9.
The supporting means 9 can consist of two or more separate members. The illustrated supporting means is in two pieces and is provided with a joint 15 and a coupling 16 so that the device quickly can be placed on a desired place at for instance two tube ends to be interconnected and be removed therefrom upon completed welding operation. The supporting means 9 can also be provided with guiding means for guiding the segments 4.
In the embodiment shown in Fig. 3 a layer 17 of an elastomeric material is provided between the segment 4 and the legs 12, 13 thereof. The segments 4 might be interconnected by means of a resilient ring 18 on which the legs 12, 13 are axially slidable.
When a welding operation is to be carried out the segmen,.s 4 are located outwardly of the outer of the elements to be interconnected and the explosive charge 3 is located inwardly of the inner of said elements. It is to be ensured that all segments 4 rest against said outer element. During the explosion the two interconnected elements are forced radially outwards and the segments 4 are intended to provide a support against this pressure, thereby ensuring that the elements 1, 2 basically maintain their original shape. The energy transferred to the segments 4 by the explosion is basically ttdnsformed to kinetic energy when the segment 4 are acceletated radially outwards. This kinetic energy is transformed to frictional heat when the a a segments 4 are braked due to the friction between cooperating frictional surfaces on the segments 4 and the supporting means 9. The friction force is chosen such that the available retarding distance is long enough to absorb all the kinetic energy.
The above described embodiment is only illustrated of the invention and modifications thereof can be-made within the scope of the claims. For instance, the number of segments can be varied and the design of the supporting means can be changed. The frictional surfaces, can be 00521 -4 arranged in other ways and the pressing force thereof can be adjusted by other means, such as screw means.
0*0 0 0 0 0060 04$* LS4 0052
Claims (6)
1. A backup device for use in explosive welding of two telescoped cylindrical members by means of an explosive charge located inside one of said members adjacent overlapping portions of said cylindrical members said device including: a ola- -ivole- t at ionP ay housing surrounding said cylindrical members; block-like support members radially displaceable within said housing; elements radially displaceable within said housing, resting upon and displaceable with said support members, and engaging said housing which defines radial friction surfaces; and means for selectively varying frictional forces between said friction surfaces; whereby, upon explosion said support members and elements are displaced radially outwardly against friction forces provided by interengaging of said frictional surfaces of 20 said housing and elements, whereby the 'fclj means of absorbing said explosion is the frictional forces.
2. A backup device according to claim 1, wherein a plurality of said friction surfaces are provided on a plurality of braking elements associated with the support members, said braking elements being alternately connected to the support members and the housing, respectively, and said friction surfaces being mutually radially displaceable.
3. A backup device according to claim 1 or 2, including a plurality of support members mutually spaced in the circumferential direction of the cylindrical members. S*
4. A backup device according to claim 3, wherein the |I support members are interconnected by means of a ring.
A backup device according to claim 3 or 4, wherein a layer of elastomeric material is provided radially between the support members and the braking elements connected to the respective support member.
6. A backup device substantially as hereinbefore 2 described with respect to what is shown in the accompanying drawings. DATED: 12 January 1990 PHILLIPS ORMONDE FITZPATRICK Attorneys for: SKF NOVA AB 4 4* 4 4 4 0977x C, -6-
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8701792A SE453808B (en) | 1987-04-29 | 1987-04-29 | DEVICE FOR EXPLOSION WELDING OF TWO OVERLAPPED RUBBER OR ANIMAL ELEMENTS |
| SE8701792 | 1987-04-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU1500588A AU1500588A (en) | 1988-11-03 |
| AU598361B2 true AU598361B2 (en) | 1990-06-21 |
Family
ID=20368369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU15005/88A Ceased AU598361B2 (en) | 1987-04-29 | 1988-04-20 | A device for use in explosive welding of two overlapping tubular or annular elements |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4880153A (en) |
| JP (1) | JPS645684A (en) |
| AU (1) | AU598361B2 (en) |
| GB (1) | GB2203977B (en) |
| NO (1) | NO167638C (en) |
| SE (1) | SE453808B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070204737A1 (en) * | 2006-03-01 | 2007-09-06 | Finkenbiner William G | Ticket dispenser |
| US7448527B1 (en) * | 2006-04-14 | 2008-11-11 | The United States Of America As Represented By The Secretary Of The Navy | Self-welding fastener |
| KR20180062322A (en) * | 2016-11-29 | 2018-06-08 | 한국과학기술원 | Vessel-attachment apparatus by using explosion welding |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5842173A (en) * | 1972-07-26 | 1975-01-30 | United Kingdom Atomic Energy Authority | Imrpovements in or relating to welding |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3910084A (en) * | 1974-03-21 | 1975-10-07 | Paton Boris E | Apparatus for explosive working of metals |
| SE442489B (en) * | 1984-05-14 | 1986-01-13 | Nitro Nobel Ab | DEVICE FOR USING EXPLOSION WELDING TO CUT TWO ROWS |
-
1987
- 1987-04-29 SE SE8701792A patent/SE453808B/en not_active IP Right Cessation
-
1988
- 1988-04-20 AU AU15005/88A patent/AU598361B2/en not_active Ceased
- 1988-04-22 US US07/192,328 patent/US4880153A/en not_active Expired - Fee Related
- 1988-04-28 JP JP63104435A patent/JPS645684A/en active Granted
- 1988-04-28 NO NO881865A patent/NO167638C/en unknown
- 1988-04-29 GB GB8810206A patent/GB2203977B/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5842173A (en) * | 1972-07-26 | 1975-01-30 | United Kingdom Atomic Energy Authority | Imrpovements in or relating to welding |
Also Published As
| Publication number | Publication date |
|---|---|
| AU1500588A (en) | 1988-11-03 |
| SE8701792D0 (en) | 1987-04-29 |
| GB2203977A (en) | 1988-11-02 |
| JPH027757B2 (en) | 1990-02-20 |
| GB2203977B (en) | 1990-04-25 |
| NO167638B (en) | 1991-08-19 |
| NO881865L (en) | 1988-10-31 |
| GB8810206D0 (en) | 1988-06-02 |
| JPS645684A (en) | 1989-01-10 |
| US4880153A (en) | 1989-11-14 |
| NO167638C (en) | 1991-11-27 |
| NO881865D0 (en) | 1988-04-28 |
| SE453808B (en) | 1988-03-07 |
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